In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest time of day to fly from TTN to SFO?

When flying from Trenton, New Jersey to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Trenton, New Jersey-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Trenton, New Jersey-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Trenton, New Jersey-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Trenton, New Jersey-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?

Yes. In addition to deals on Trenton to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Trenton to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Francisco.

Can I find deals for business class flights from Trenton to San Francisco?

Yes. Cheapflights offers flight deals from Trenton to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$147+ Flights from Trenton, NJ to San Francisco

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Cheap flight deals from Trenton to San Francisco

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Popular in	December
Cheapest in	January
Average price	$338

Provider with most accurate pricing for Trenton-Mercer-San Francisco flight deals.

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Provider most trusted by Cheapflights users for Trenton-Mercer-San Francisco flights.

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Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in January 2026

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Find flight deals from Trenton to San Francisco

One-way flights from Trenton to San Francisco
Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated enero 15, 2026.

vie. 2/271:52 pm

TTN

SFO

2 stops35h 29m

Frontier

Deal found 1/13

$147

vie. 2/271:52 pm

TTN

SFO

3 stops31h 06m

Multiple Airlines

Deal found 1/13

$196

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TrentonSan Francisco

TTN - SFO

TTNSFO

Trenton-Mercer

vie. 2/27

1:52 pm-10:21 pm

2 stops35h 29m

$147

TrentonSan Francisco

TTN - SFO

TTNSFO

Trenton-Mercer

vie. 2/27

1:52 pm-5:58 pm

3 stops31h 06m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/13

Compare providers for flights from Trenton to San Francisco

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Trenton to San Francisco in January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Trenton, New Jersey-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Trenton, New Jersey-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Trenton, New Jersey-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Trenton, New Jersey-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Trenton to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Trenton with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Trenton to San Francisco

What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?

Currently, February is the cheapest month in which you can book a flight from Trenton, New Jersey to San Francisco (average of $71). Flying from Trenton, New Jersey to San Francisco in May is currently the most expensive (average of $181). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?
Yes. In addition to deals on Trenton to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Trenton to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Francisco.
Can I find deals for business class flights from Trenton to San Francisco?
Yes. Cheapflights offers flight deals from Trenton to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?
Currently, February is the cheapest month in which you can book a flight from Trenton, New Jersey to San Francisco (average of $71). Flying from Trenton, New Jersey to San Francisco in May is currently the most expensive (average of $181). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$147+ Cheap flights from Trenton, NJ to San Francisco (TTN - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Trenton to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Trenton to San Francisco

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Find flight deals from Trenton to San Francisco

One-way flights from Trenton to San FranciscoSearch for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated enero 15, 2026.

Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated enero 15, 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to San Francisco that are best for you.

Compare providers for flights from Trenton to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Trenton to San Francisco in January.

Best time to book a flight from Trenton to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Trenton with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Trenton to San Francisco

What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?

Related info for your journey

Find useful and relevant information for your journey from Trenton to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?

How can I find direct flights from Trenton to San Francisco?

Can I find deals for business class flights from Trenton to San Francisco?

What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?

Traveling to a place near San Francisco?

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One-way flights from Trenton to San Francisco
Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated enero 15, 2026.